Williams Obstetrics, 26e: Chapter 43 Quiz
20 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the term used to describe the separation of the placenta from its implantation site before delivery?

  • Placental spectrum
  • Placental abruption (correct)
  • Placental accreta
  • Placental previa
  • How does Latin translate the term 'abruptio placentae'?

  • Rending asunder of the placenta (correct)
  • Premature separation of placenta
  • Placenta previa separation
  • Accidental placenta rupture
  • Which of the following is NOT one of the three placental disorders mentioned in the text?

  • Placenta previa
  • Placental abruption
  • Placenta separation disorder (correct)
  • Placenta accreta spectrum
  • What is the approximate rate of blood flow through the intervillous space at term, as mentioned in the text?

    <p>600 mL/min</p> Signup and view all the answers

    Which placental disorder is described as being more common now than in previous years, posing a substantial threat to maternal well-being?

    <p>Placental accreta spectrum</p> Signup and view all the answers

    'Premature separation of the normally implanted placenta' is described as what?

    <p>'Premature separation' term is most descriptive</p> Signup and view all the answers

    'Hemorrhage following partial or complete separation of the placenta can be torrential' implies what about this type of hemorrhage?

    <p>'Torrential' implies rapid and copious hemorrhage.</p> Signup and view all the answers

    Where does the blood and clots dissect to reach in a partial placental abruption?

    <p>Between membranes and decidua</p> Signup and view all the answers

    What is the main source of blood in a retroplacental hematoma in a nontraumatic placental abruption?

    <p>Maternal</p> Signup and view all the answers

    What percentage of women with a nontraumatic placental abruption at Parkland Hospital had fetal-to-maternal hemorrhage documented?

    <p>20 percent</p> Signup and view all the answers

    Why is fetal-to-maternal hemorrhage less common in nontraumatic placental abruptions?

    <p>Placental villi are usually initially intact</p> Signup and view all the answers

    What is a distinguishing feature of total placental abruption shown on the left in the schematic?

    <p>Concealed hemorrhage</p> Signup and view all the answers

    Which area does the blood and clots dissect through in a partial placental abruption?

    <p>Membranes and decidua</p> Signup and view all the answers

    What does the main source of hemorrhage derive from in nontraumatic placental abruptions?

    <p>Separation within maternal decidua</p> Signup and view all the answers

    What is the initial event likely to trigger placental abruption?

    <p>Rupture of a decidual spiral artery</p> Signup and view all the answers

    How does a decidual hematoma contribute to placental abruption?

    <p>It compresses the adjacent placenta</p> Signup and view all the answers

    What condition may predispose some cases of placental abruption according to Brosens, 2011?

    <p>Atherosis due to impaired trophoblastic invasion</p> Signup and view all the answers

    Why can histological findings not determine the timing of placental abruption?

    <p>The abruption process is not reflected in histology</p> Signup and view all the answers

    What happens when bleeding insinuates itself between the membranes and uterine wall during placental abruption?

    <p>It eventually causes external hemorrhage through the cervix</p> Signup and view all the answers

    Why is delayed diagnosis more common in cases of concealed hemorrhage during placental abruption?

    <p>'The bleeding is often misinterpreted as normal pregnancy discharge'</p> Signup and view all the answers

    Study Notes

    Placental Abruption

    • Abruptio placentae is the term used to describe the separation of the placenta from its implantation site before delivery, and it translates to "breaking off" in Latin.
    • It is a type of placental disorder that poses a substantial threat to maternal well-being.

    Characteristics of Placental Abruption

    • Premature separation of the normally implanted placenta is a distinguishing feature of placental abruption.
    • Hemorrhage following partial or complete separation of the placenta can be torrential.
    • In a partial placental abruption, the blood and clots dissect through the decidua basalis to reach the intervillous space.
    • The main source of blood in a retroplacental hematoma in a nontraumatic placental abruption is the maternal circulation.

    Fetal-to-Maternal Hemorrhage

    • Fetal-to-maternal hemorrhage is less common in nontraumatic placental abruptions due to the separation of the placenta from the maternal circulation.
    • Approximately 14% of women with a nontraumatic placental abruption at Parkland Hospital had fetal-to-maternal hemorrhage documented.

    Total Placental Abruption

    • A distinguishing feature of total placental abruption is the complete separation of the placenta from the uterine wall.

    Pathophysiology of Placental Abruption

    • The initial event likely to trigger placental abruption is the formation of a decidual hematoma.
    • A decidual hematoma contributes to placental abruption by accumulating between the placenta and uterine wall, causing the placenta to separate.
    • Chronic hypertension may predispose some cases of placental abruption according to Brosens, 2011.

    Diagnosis and Complications

    • Histological findings cannot determine the timing of placental abruption.
    • When bleeding insinuates itself between the membranes and uterine wall during placental abruption, it can cause a concealed hemorrhage.
    • Delayed diagnosis is more common in cases of concealed hemorrhage during placental abruption due to the lack of visible bleeding.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Related Documents

    Description

    Test your knowledge on hemorrhagic placental disorders as discussed in Chapter 43 of Williams Obstetrics, 26th edition. Questions cover topics such as placental abruption, placenta previa, and placenta accreta spectrum.

    More Like This

    Use Quizgecko on...
    Browser
    Browser